He was killed in air accident.

他在那次飞机失事中遇险身亡。

《新英汉大辞典》

The air accident happened in winter.

那次空难发生在冬天。

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Do you know how the air accident came about?

你知道这次飞机失事是怎样发生的吗？

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But Chesley Sullenberger is also an expert on air safety, including accident investigations, and even has his own consulting business.

VOA: special.2009.01.30

Despite the tragic accident, excitement is in the air as South Africa hosts the World Cup.

VOA: standard.2010.06.11

Mr.Netanyahu attended the funeral of an air force pilot who was killed in a training accident.

VOA: standard.2009.09.14

Earlier this year, however, a mid-air accident forced him to take to his blog.

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Air accident investigators concluded that the may have been misled into taking the wrong emergency action.

BBC: Officer recalls plane crash scene

Air accident investigators found the helicopter had suffered a cracked shaft in the gearbox.

BBC: Island Enforcer